:root{--bg: #f4f5f7;--surface: #ffffff;--surface-2: #eef0f3;--border: #d9dce1;--text: #1a1d21;--text-muted: #6b7280;--primary: #2563eb;--primary-hover: #1d4ed8;--success: #16a34a;--danger: #dc2626;--warning: #d97706;--radius: 10px;--shadow: 0 1px 3px rgba(0, 0, 0, .08), 0 1px 2px rgba(0, 0, 0, .04)}:root[data-theme=dark]{--bg: #0f1115;--surface: #181b21;--surface-2: #21252c;--border: #2c313a;--text: #e7eaee;--text-muted: #9aa2ad;--primary: #3b82f6;--primary-hover: #2563eb;--shadow: 0 1px 3px rgba(0, 0, 0, .4)}*{box-sizing:border-box}body{margin:0;font-family:Segoe UI,system-ui,-apple-system,sans-serif;background:var(--bg);color:var(--text);font-size:15px}a{color:var(--primary);text-decoration:none}.app{display:flex;min-height:100vh}.sidebar{width:230px;background:var(--surface);border-right:1px solid var(--border);padding:20px 14px;display:flex;flex-direction:column;gap:6px}.brand{font-size:18px;font-weight:700;padding:6px 10px 18px}.nav-link{display:block;padding:12px 14px;border-radius:var(--radius);color:var(--text);font-weight:500}.nav-link:hover{background:var(--surface-2)}.nav-link.active{background:var(--primary);color:#fff}.sidebar-footer{margin-top:auto;font-size:13px;color:var(--text-muted)}.content{flex:1;padding:28px 34px;overflow:auto}.page-title{font-size:24px;font-weight:700;margin:0 0 20px}.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:20px;margin-bottom:20px}.row{display:flex;gap:14px;flex-wrap:wrap}table{width:100%;border-collapse:collapse}th,td{text-align:left;padding:12px 14px;border-bottom:1px solid var(--border)}th{font-size:13px;color:var(--text-muted);text-transform:uppercase;letter-spacing:.03em}tbody tr:hover{background:var(--surface-2);cursor:pointer}label{display:block;font-size:13px;color:var(--text-muted);margin:0 0 6px}input,select{width:100%;padding:12px 14px;font-size:15px;background:var(--surface-2);border:1px solid var(--border);border-radius:var(--radius);color:var(--text)}.field{margin-bottom:14px}.btn{padding:13px 22px;font-size:15px;font-weight:600;border:none;border-radius:var(--radius);background:var(--primary);color:#fff;cursor:pointer}.btn:hover{background:var(--primary-hover)}.btn:disabled{opacity:.6;cursor:default}.btn-ghost{background:var(--surface-2);color:var(--text)}.btn-success{background:var(--success)}.btn-danger{background:var(--danger)}.btn-lg{padding:16px 28px;font-size:17px}.badge{display:inline-block;padding:4px 10px;border-radius:999px;font-size:12px;font-weight:600}.badge-active{background:#2563eb26;color:var(--primary)}.badge-redeemed,.badge-closed{background:#16a34a26;color:var(--success)}.badge-overdue{background:#dc262626;color:var(--danger)}.badge-extended{background:#d9770626;color:var(--warning)}.error{background:#dc26261f;color:var(--danger);padding:12px 14px;border-radius:var(--radius);margin-bottom:14px}.muted{color:var(--text-muted)}.big-number{font-size:30px;font-weight:700}.stat{flex:1;min-width:150px}.print-doc{max-width:820px;margin:0 auto;padding:24px;background:#fff;color:#000}.print-doc h3{margin:18px 0 8px;border-bottom:1px solid #000;padding-bottom:4px}.doc-table{width:100%;border-collapse:collapse}.doc-table td,.doc-table th{border:1px solid #999;padding:6px 10px;color:#000;text-align:left}@media print{.no-print{display:none!important}body{background:#fff}.print-doc{max-width:100%;padding:0}}.login-wrap{display:flex;align-items:center;justify-content:center;min-height:100vh}.login-card{width:360px;background:var(--surface);border:1px solid var(--border);border-radius:14px;box-shadow:var(--shadow);padding:32px}